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PC-DIO-24/PnP
User Manual
24-bit Digital I/O Board for ISA Computers
February 1998 Edition
Part Number 320288C-01
© Copyright 1989, 1998 National Instruments Corporation. All rights reserved.
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Internet Support E-mail: support@natinst.com FTP Site: ftp.natinst.com Web Address: http://www.natinst.com Bulletin Board Support BBS United States: 512 794 5422 BBS United Kingdom: 01635 551422 BBS France: 01 48 65 15 59 Fax-on-Demand Support 512 418 1111 Telephone Support (USA) Tel: 512 795 8248 Fax: 512 794 5678 International Offices Australia 03 9879 5166, Austria 0662 45 79 90 0, Belgium 02 757 00 20, Brazil 011 288 3336, Canada (Ontario) 905 785 0085, Canada (Québec) 514 694 8521, Denmark
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Important Information Warranty The PC-DIO-24 and PC-DIO-24PnP boards are warranted against defects in materials and workmanship for a period of one year from the date of shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace equipment that proves to be defective during the warranty period. This warranty includes parts and labor. The media on which you receive National Instruments software are warranted not to fail to execu
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FCC/DOC Radio Frequency Interference Class A Compliance This equipment generates and uses radio frequency energy and, if not installed and used in strict accordance with the instructions in this manual, may cause interference to radio and television reception. Classification requirements are the same for the Federal Communications Commission (FCC) and the Canadian Department of Communications (DOC). This equipment has been tested and found to comply with the following two regulatory a
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Contents About This Manual Organization of This Manual........................................................................................ix Conventions Used in This Manual................................................................................x National Instruments Documentation ...........................................................................xii Related Documentation.................................................................................................xiii Custo
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Contents Digital I/O Power-up State Selection ........................................................................... 3-7 High DIO Power-up State .............................................................................. 3-7 Low DIO Power-up State............................................................................... 3-9 Timing Specifications................................................................................................... 3-10 Mode 1 Input Timing ...............
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Contents Mode 1—Strobed Input..................................................................................C-11 Mode 1 Input Programming Example..............................................C-13 Mode 1—Strobed Output ...............................................................................C-14 Mode 1 Output Programming Example ...........................................C-16 Mode 2—Bidirectional Bus............................................................................C-17 Mode 2 P
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Contents Figure 3-7. Mode 2 Timing Specification for Bidirectional Transfers .................... 3-14 Figure 4-1. PC-DIO-24/PnP Block Diagram ........................................................... 4-1 Figure C-1. Control Word Formats for the 82C55A ................................................ C-4 Figure C-2. Port C Pin Assignments, Mode 1 Input................................................. C-13 Figure C-3. Port C Pin Assignments, Mode 1 Output .......................................
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About This Manual This manual describes the mechanical and electrical aspects of the PC-DIO-24/PnP and contains information concerning its operation and programming. The PC-DIO-24/PnP is a member of the National Instruments family of I/O channel expansion boards for ISA computers. These boards are designed for high-performance, low-cost data acquisition and control for applications in laboratory testing, production testing, and industrial process monitoring and control. This manual applies
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About This Manual • Appendix C, Register-Level Programming, describes in detail the address and function of each of the PC-DIO-24/PnP control and status registers. Using Your PC-DIO-24 (Non-PnP) Board • Appendix D, , describes the differences between the PC-DIO-24 and PC-DIO-24PnP boards, the PC-DIO-24 board configuration, and the PC-DIO-24 installation into your computer. Customer Communication • Appendix E, , contains forms you can use to request help from National Instruments or to comm
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About This Manual monospace Text in this font denotes text or characters that you should enter literally from the keyboard, sections of code, programming examples, and syntax examples. This font is also used for the proper names of disk drives, paths, directories, programs, subprograms, subroutines, device names, functions, operations, variables, filenames and extensions, and for statements and comments taken from programs. NI-DAQ NI-DAQ refers to the NI-DAQ software for PC compatibles unle
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About This Manual National Instruments Documentation The PC-DIO-24/PnP User Manual is one piece of the documentation set for your data acquisition (DAQ) system. You could have any of several types of manuals, depending on the hardware and software in your system. Use the different types of manuals you have as follows: Getting Started with SCXI • —If you are using SCXI, this is the first manual you should read. It gives an overview of the SCXI system and contains the most commonly needed inf
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About This Manual Related Documentation The following documents contain information that you may find helpful as you read this manual: • Your computer technical reference manual • Plug and Play ISA Specification Customer Communication National Instruments wants to receive your comments on our products and manuals. We are interested in the applications you develop with our products, and we want to help if you have problems with them. To make it easy for you to contact us, this manual contains
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Chapter 1 Introduction This chapter describes the PC-DIO-24/PnP, lists what you need to get started, describes software programming choices, optional equipment, and custom cables, and explains how to unpack the PC-DIO-24/PnP. About the PC-DIO-24/PnP Thank you for purchasing the National Instruments PC-DIO-24/PnP. The PC-DIO-24/PnP is a low cost, 24-bit, parallel digital I/O interface for ISA computers. An OKI 82C55A programmable peripheral interface (PPI) chip controls the 24 bits of digita
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Chapter 1 Introduction What You Need to Get Started To set up and use your PC-DIO-24/PnP, you will need the following: ❑ PC-DIO-24PnP or PC-DIO-24 board PC-DIO-24/PnP User Manual ❑ ❑ One of the following software packages and documentation: BridgeVIEW ComponentWorks LabVIEW for Windows LabWindows/CVI Measure NI-DAQ for PC compatibles VirtualBench ❑ Your computer Software Programming Choices You have several options to choose from when programming your National Instruments DAQ and SCXI hardware.
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Chapter 1 Introduction LabWindows/CVI features interactive graphics and a state-of-the-art user interface and uses the ANSI standard C programming language. The LabWindows/CVI Data Acquisition Library, a series of functions for using LabWindows/CVI with National Instruments DAQ hardware, is included with the NI-DAQ software kit. The LabWindows/CVI Data Acquisition Library is functionally equivalent to the NI-DAQ software. VirtualBench features virtual instruments that combine DAQ products,
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Chapter 1 Introduction ComponentWorks, Conventional LabVIEW, Programming Environment LabWindows/CVI, or VirtualBench NI-DAQ Driver Software Personal DAQ or Computer or SCXI Hardware Workstation Figure 1-1. The Relationship between the Programming Environment, NI-DAQ, and Your Hardware Register-Level Programming The final option for programming any National Instruments DAQ hardware is to write register-level software. Writing register-level programming software can be very time-consuming a
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Chapter 1 Introduction Optional Equipment National Instruments offers a variety of products to use with your PC-DIO-24/PnP board, including cables, connector blocks, and other accessories, as follows: • Cables and cable assemblies, shielded and ribbon • Connector blocks, shielded and unshielded 50-pin screw terminals • SCXI modules and accessories for isolating, amplifying, exciting, and multiplexing signals for relays and analog output. With SCXI you can condition and acquire up to 3,072 ch
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Chapter 1 Introduction The mating connector for the PC-DIO-24/PnP is a 50-position, polarized, ribbon socket connector with strain relief. National Instruments uses a polarized (keyed) connector to prevent inadvertent upside-down connection to the PC-DIO-24/PnP. Recommended manufacturer part numbers for this mating connector are as follows: • Electronic Products Division/3M (part number 3425-7650) • T&B/Ansley Corporation (part number 622-5041) The standard ribbon cables (50-conductor, 28 AW
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Chapter 1 Introduction Unpacking Your PC-DIO-24/PnP board is shipped in an antistatic package to prevent electrostatic damage to the board. Electrostatic discharge can damage several components on the board. To avoid such damage in handling the board, take the following precautions: • Ground yourself via a grounding strap or by holding a grounded object. • Touch the antistatic package to a metal part of your PC chassis before removing the board from the package. • Remove the board from the
